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Design Trade-offs for a Robust Dynamic Hybrid Hash Join (Extended Version) [article]

Shiva Jahangiri, Michael J. Carey, Johann-Christoph Freytag
2021 arXiv   pre-print
The Join operator, as one of the most expensive and commonly used operators in database systems, plays a substantial role in Database Management System (DBMS) performance.  ...  We explore the impact of the number of partitions on the performance of HHJ and propose a lower bound and a default value for the number of partitions.  ...  Based on a simulation study, Management of Data, COMAD 1994, Windsor Manor Sheraton & Towers, Bangalore, we recommended 20 as the minimum number of partitions and also  ... 
arXiv:2112.02480v1 fatcat:edxylscxrzgwlbxcmy3ku33s7m